lavfi: add an avgblur_vulkan filter

Multimedia / FFmpeg - Lynne [lynne.ee] - 4 February 2020 23:19 EST

This commit adds a fast avgblur Vulkan filter. This will reset Intel GPUs on Linux due to a known, two-year-old driver bug (!834 on mesa's gitlab).

a2db7343e0 lavfi: add an avgblur_vulkan filter
configure | 1 +
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/vf_avgblur_vulkan.c | 406 ++++++++++++++++++++++++++++++++++++++++
4 files changed, 409 insertions(+)

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